Added always and never

README.md

@@ -30,6 +30,13 @@ new ConstructorWithMandatoryCallback(nop)
 a === identity(a)  // => true
 ```
 
+**always** and **never** return true and false respectively
+
+```typescript
+always()  // => true
+never()  // => false
+```
+
 **partial** applies a partial configuration object as first argument of compatible functions:
 
 ```typescript

package.json

@@ -1,6 +1,6 @@
 {
   "name": "tk-functional",
-  "version": "0.1.2",
+  "version": "0.1.3",
   "description": "Typescript/Javascript helpers for functional-style programming",
   "source": "src/index.ts",
   "main": "dist/tk-functional.js",
@@ -26,4 +26,4 @@
     "tk-base": "^0.1.7"
   },
   "dependencies": {}
-}
+}

src/index.test.ts

@@ -1,4 +1,4 @@
-import { partial, cmp, nop, identity } from "./index";
+import { always, cmp, identity, never, nop, partial } from "./index";
 
 describe("nop", () => {
   it("does nothing", () => {
@@ -35,3 +35,19 @@ describe("cmp", () => {
     expect(["c", "a", "b"].sort(cmp())).toEqual(["a", "b", "c"]);
   });
 });
+
+describe("always", () => {
+  it("returns true", () => {
+    expect(always()).toBe(true);
+    expect(always(true)).toBe(true);
+    expect(always(false)).toBe(true);
+  });
+});
+
+describe("never", () => {
+  it("returns false", () => {
+    expect(never()).toBe(false);
+    expect(never(true)).toBe(false);
+    expect(never(false)).toBe(false);
+  });
+});

src/index.ts

@@ -37,3 +37,13 @@ export function cmp(args?: Partial<cmpArgs>): (a: any, b: any) => number {
     }
   }
 }
+
+/**
+ * Predicate that always returns true
+ */
+export const always = (...args: any[]) => true
+
+/**
+ * Predicate that always returns false
+ */
+export const never = (...args: any[]) => false